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Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
07:30

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions

Published on: April 23, 2021

Cognitive dysfunction in congestive heart failure: transcranial Doppler evidence of microembolic etiology

Pedro A P Jesus1, Rodrigo M Vieira-de-Melo, Francisco J F B Reis

  • 1Cardiomyopathy Clinic, Federal University of Bahia, Salvador, BA, Brazil.

Arquivos De Neuro-Psiquiatria
|June 23, 2006
PubMed

Insights

Cognitive impairment in heart failure patients is linked to cerebrovascular hemodynamics, not cardiac function. Higher resistance in cerebral arteries correlates with poorer cognitive scores, suggesting microembolism plays a role.

Area of Science:

  • Cardiology
  • Neurology
  • Medical Imaging

Background:

  • Cognitive symptoms are prevalent in congestive heart failure (CHF) patients.
  • These symptoms are often attributed to reduced cerebral blood flow.

Purpose of the Study:

  • To investigate the relationship between cognitive function (Mini Mental State Exam - MMSE), cardiac function (echocardiogram), and cerebrovascular hemodynamics (transcranial Doppler - TCD) in CHF patients.

Main Methods:

  • Eighty-three CHF patients were assessed.
  • Cardiac function was evaluated using echocardiography.
  • Cerebrovascular hemodynamics were measured using transcranial Doppler (TCD) to assess right middle cerebral artery (RMCA) parameters.
  • Global cognitive function was assessed using the Mini Mental State Exam (MMSE).

Main Results:

  • No significant correlation was found between echocardiographic parameters and MMSE scores.
  • A significant correlation was observed between RMCA mean flow velocity and MMSE scores (r=0.231, p=0.039).
  • A significant inverse correlation was found between RMCA pulsatility index and MMSE scores (rs=-0.292, p=0.015).
  • After excluding patients with a history of stroke, the RMCA pulsatility index remained significantly correlated with MMSE scores (rs=-0.314, p=0.007).

Conclusions:

  • Cerebrovascular hemodynamics, specifically RMCA pulsatility index, are correlated with cognitive function in CHF patients.
  • The findings suggest that elevated cerebrovascular resistance may contribute to cognitive impairment in CHF.
  • Microembolism is proposed as a potential mechanism underlying cognitive symptoms in this population.

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